Why do I not have the Ask a friend button for chargers in collections 211-216?

As you can see yourself, the rewards for these collections are really great. So it is self-explanatory that the requirements for charging are more difficult than for the regular collections. Thus the option of asking friends to gift the chargers is missing. But please do not worry, the necessary chargers drop from the Mysterious Living Room, so there is still a chance to get them for free!